DISPLAY DEVICE AND METHOD FOR DRIVING SAME

摘要

A display device includes light-emitting pixels, a voltage source, power supply lines for supplying drive voltage from the voltage source to each light-emitting pixel, a voltage drop amount estimating unit which estimates an amount of voltage drop between the voltage source and each light-emitting pixel, using video data indicating light emission luminance of each light-emitting pixel, a first storage unit which holds correction information indicating light emission characteristics obtained when a driving transistor in the light-emitting pixel operates both in linear and saturated regions, a second storage unit which holds reference characteristic information indicating light emission characteristics obtained when the driving transistor operates in the saturated region, and a luminance signal correcting unit which generates the luminance signal by correcting a reference level of the luminance signal associated with the light emission luminance, based on the estimated amount of voltage drop and the correction information.

主权项

1. A display device comprising:
a display unit including a plurality of light-emitting pixels in an array, each of the plurality of light-emitting pixels including: a light-emitting element which emits light according to a supplied current; and a driving transistor which supplies, to the light-emitting element, a drive current corresponding to a level of a luminance signal; a voltage source which generates a drive voltage to be supplied to the display unit; a power supply line connected to the plurality of light-emitting pixels and the voltage source to supply the drive voltage from the voltage source to each of the plurality of light-emitting pixels; a voltage drop amount estimating unit configured to estimate an amount of voltage drop on the power supply line between the voltage source and each of the plurality of light-emitting pixels, using video data indicating a light emission luminance of each of the plurality of light-emitting pixels; a first storage unit which holds correction information indicating a relationship between a luminance at which the light-emitting element emits light and a level of the luminance signal, the relationship being obtained when the driving transistor operates both in a linear region and a saturated region; a second storage unit which holds reference characteristic information indicating a relationship between a luminance at which the light-emitting element emits light and a level of the luminance signal, the relationship being obtained when the driving transistor operates in the saturated region; and a luminance signal correcting unit configured to generate the luminance signal having a corrected level by correcting a reference level based on the estimated amount of voltage drop and the correction information, the reference level being a level of the luminance signal associated, by the reference characteristic information, with the light emission luminance indicated by the video data.